body {
  background: #000;
  filter: blur(5px) contrast(10);
  overflow: hidden;
}

.ball {
  position: absolute;
  left: 0;
  top: 40vh;
  height: 20vh;
  width: 20vh;
  border-radius: 50%;
  background: #ffffff;
  animation: move 10s infinite;
}

.g-wall {
  position: absolute;
  left: 20%;
  top: 30vh;
  height: 40vh;
  width: 15vh;
  border-radius: 50%;
  background: rgba(0, 0, 0, 1);
}

.g-wall:nth-child(2) {
  left: 40%;
}

.g-wall:nth-child(3) {
  left: 60%;
}

.g-wall:nth-child(4) {
  left: 80%;
}

@keyframes move {
  20% {
    transform: translate(20vw,0);
    background: #dddddd;
  }
  100% {
    transform: translate(100vw,0);
    background: #dddddd;
  }
}
